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我国铜冶炼行业废气管理现状及对策建议

广州化工 2024年第12期52卷 104-106页

作者：汪灵伟刘伟王鹏程钱玮余俊霞云南铜业股份有限公司西南铜业分公司云南昆明650000 云南铜业股份有限公司云南昆明650000 云南绿色环境科技开发有限公司云南昆明650000

铜工业作为我国重要的基础材料产业,在经济、国防和高新技术产业发展中发挥着重要的作用。在为经济建设和社会发展作出重大贡献的同时,也带来了诸多的环境污染问题,其中,铜冶炼过程中的废气治理一直是企业环境管理工作中的重难点。本文... 详细信息

铜工业作为我国重要的基础材料产业,在经济、国防和高新技术产业发展中发挥着重要的作用。在为经济建设和社会发展作出重大贡献的同时,也带来了诸多的环境污染问题,其中,铜冶炼过程中的废气治理一直是企业环境管理工作中的重难点。本文通过对我国铜冶炼行业现状、废气产排污特征进行阐述,综合分析了铜冶炼行业废气管理中存在的主要问题,以我国生态环境保护政策为导向,提出对策建议,为铜冶炼行业废气管理提供思路。

关键词：铜冶炼废气环境管理

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改性生物吸附剂对碱性品红的吸附行为研究

化学工程师 2011年第7期25卷 30-33,36页

作者：何正艳齐亚凤余军霞池汝安武汉工程大学绿色化工过程省部共建教育部重点实验室湖北武汉430073

为提高生物吸附剂对阳离子染料的吸附能力,本文采用简单的方法制备了均苯四甲酸酐修饰的啤酒酵母和甘蔗渣。实验结果表明:经过修饰后的啤酒酵母和甘蔗渣对阳离子染料碱性品红的吸附量分别为528.1和736.5mg.g-1,是未修饰的3.3和7.6倍,且... 详细信息

为提高生物吸附剂对阳离子染料的吸附能力,本文采用简单的方法制备了均苯四甲酸酐修饰的啤酒酵母和甘蔗渣。实验结果表明:经过修饰后的啤酒酵母和甘蔗渣对阳离子染料碱性品红的吸附量分别为528.1和736.5mg.g-1,是未修饰的3.3和7.6倍,且分别能在630min和645min时达到最大吸附量并保持平衡。离子强度实验表明当共存离子K+的浓度低于0.1mol.L-1时,对碱性品红的吸附基本无影响。修饰后的这两种生物吸附剂对阳离子染料的吸附容量有了显著提高,且抗干扰能力强,有望应用于实际染料废水的处理中。

关键词：啤酒酵母甘蔗渣碱性品红均苯四甲酸二酐

Opportunities and challenges of the Sponge City construction related to urban water issues in China

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Science China Earth Sciences 2017年第4期60卷 652-658页

作者： xia jun ZHANG YongYong XIONG LiHua HE Shan WANG LongFeng yu ZhongBo State Key Laboratory of Water Resources & Hydropower Engineering Sciences Wuhan University Wuhan 430072 China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China CPG Consultants Pte Ltd 1 Gateway Drive Westgate Tower Singapore 608531 Singapore State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China

Waterlogging is one of the major water issues in most cities of China and directly restricts their urbanization *** construction of Sponge City is an effective approach to solving the urban water issues,particularly for the *** this study,both the urban issues emerged at the stage of rapid urbanization in China and the demands as well as problems of Sponge City construction related with the water issues were investigated,and the opportunities and challenges for the Sponge City construction in the future were also *** was found that the current stormwater management focused on the construction of gray infrastructures(e.g.,drainage network and water tank) based on the fast discharge idea,which was costly and hard to catch up with the rapid expansion of city and its impervious surface,while green infrastructures(e.g.,river,lake and wetland)were ***,the current construction of Sponge City was still limited to low impacted development(LID) approach which was concentrated on source control measures without consideration of the critical functions of surrounding landscapes(i.e.,mountain,river,wetland,forest,farmland and lake),while application of the integrated urban water system approach and its supported technologies including municipal engineering,urban hydrology,environmental science,social science and ecoscape were relatively weak and needed to be ***,the lack of special Sponge City plan and demonstration area was also a considerable *** this paper,some perspectives on Good Sponge City Construction were proposed such as the point that idea of urban plan and construction should conform to the integral and systematic view of sustainable urban ***,both the basic theoretical research and the basic infrastructure construction such as monitoring system,drainage facility and demonstration area should be strengthened,meanwhile,the reformation and innovation in the urban water management system and

关键词： Tibetan Plateau Indian Plate Asian Plate Initial collision Suturing processes

How interfacial electron-donating defects influence the structure and charge of gold nanoparticles on TiO_(2)support

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Nano Research 2024年第7期17卷 5965-5974页

作者： Guang-Jie xia yu Fu Wei Cao jun Li Yang-Gang Wang Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and TechnologyShenzhen 518055China School of Physical Sciences Great Bay UniversityDongguan 523000China Department of Chemistry Tsinghua UniversityBeijing 100084China

The reduction degree of TiO_(2)support is critical to the performances of metal *** many previous theoretical calculations,only the bridge oxygen vacancy(Ov)was considered as the electron-donating defect on reduced rutile TiO_(2)(r-TiO_(2−x))***,titanium adatoms(Tiad.),oxidized titanium islands(***),and acid hydroxyls(ObrH)also exist at the metal/support *** conducting density functional theory(DFT)calculations and ab initio molecular dynamics(AIMD)simulations,we compared r-TiO_(2−x)surfaces with Ov,Tiad.,***,and ObrH sites loaded with Au nanoparticles(NPs).The results showed the Au NPs were oxygen-phobic but titanium-philic,resulting in wetting of Ov and *** short contact with *** and *** Bader charges of Au NPs(QM)showed a good linear relationship with the ideal number of donating electrons(Ne)from the defective sites(QM=−KeNe+QM,S),demonstrating the intrinsic electron allocation at the *** Ov,Tiad.,and *** exhibited similar slopes(Ke),relatively steeper than that of *** means in the scope of Au NP charge state,the *** *** have a close electron-donating ability with Ov,but the ObrH donates relatively fewer *** linear relationship can be extended approximately to other *** higher the metal work function,the steeper the Ke for easier electron donation from defective *** stronger the metal oxygen affinity,the more positive the intercept(QM,S).That explains the easy generation of metallic or negative Pt and Au NPs on r-TiO_(2−x),but hard for Cu and Zn in *** provides theoretical guidance for regulating the charge of metal NPs over TiO_(2−x)supports.

关键词： metal-support interaction titanium oxide oxygen vacancy surface hydroxyl titanium adatom

In-situ measurement via the flow-through method and numerical simulations for radon exhalation during measurements of the radon exhalation rate

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Nuclear Science and Techniques 2024年第7期35卷 192-207页

作者： Ming xia Yong-jun Ye Shan-Wei Shang Ting yu Dai-Jia Chen School of Resources Environment and Safety Engineering University of South ChinaHengyang421001China Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy University of South ChinaHengyang421001China

Small-scale measurements of the radon exhalation rate using the flow-through and closed-loop methods were conducted on the surface of a uranium tailing pond to better understand the differences between the two *** abnormal radon exhalation behavior was observed,leading to computational fluid dynamics(CFD)-based simulations in which dynamic radon migration in a porous medium and accumulation chamber was *** on the in-situ experimental and numerical simulation results,variations in the radon exhalation rate subject to permeability,flow rate,and insertion depth were quantified and *** in-situ radon exhalation rates measured using the flow-through method were higher than those measured using the closed-loop method,which could be explained by the negative pressure difference between the inside and outside of the chamber during the *** consistency of the variations in the radon exhalation rate between the experiments and simulations suggests the reliability of CFD-based techniques in obtaining the dynamic evolution of transient radon exhalation rates for diffusion and convection at the porous medium-air *** synergistic effects of the three factors(insertion depth,flow rate,and permeability)on the negative pressure difference and measured exhalation rate were quantified,and multivariate regression models were established,with positive correlations in most cases;the exhalation rate decreased with increasing insertion depth at a permeability of 1×10^(−11) m^(2).CFD-based simulations can provide theoretical guidance for improving the flow-through method and thus achieve accurate measurements.

关键词： Radon exhalation Flow-through Numerical simulation Accumulation chamber Multivariate regression

The influence of metabolic syndrome on atrial fibrillation recurrence: five-year outcomes after a single cryoballoon ablation procedure

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Journal of Geriatric Cardiology 2021年第12期18卷 1019-1028页

作者： yu xia xiao-Feng LI jun LIU Miao yu Pi-Hua FANG Shu ZHANG State Key Laboratory of Cardiovascular Disease Cardiac Arrhythmia CenterFuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

BACKGROUND Metabolic syndrome(MetS)has been reported as a risk factor of atrial fibrillation(AF)recurrence after radi-ofrequency catheter *** study aimed to investigate the long-term influence of MetS on paroxysmal AF recurrence after a single cryoballoon ablation procedure,which was scarcely investigated yet in Chinese *** In total,137 paroxysmal AF patients who had successfully completed a single cryoballoon ablation procedure at Fuwai Hospital,Beijing,China from December 2013 to October 2015 were *** for patients with AF recurrence,all patients were followed up for no less than five *** predictors of AF recurrence were determined by Cox propor-tional hazards regression *** Among 137 paroxysmal AF patients,91 patients(66.4%)had successfully achieved overall five-year follow-up after a single cryoballoon ablation procedure,and 44 patients(32.1%)had *** with MetS had a significant lower incidence of freedom from AF recurrence than those without MetS(50.0%vs.74.2%,log-rank P<0.01)during the five-year ***(HR=1.95,95%CI:1.069−3.551,P=0.030)was an independent predictor of AF recurrence after adjusting for multiple *** the second year post cryoballoon ablation procedure,the recurrence rate of AF gradually increased in patients with MetS,in con-trast,decreased recurrence rate of AF in patients without *** MetS is an independent predictor for five-year AF recurrence after a single cryoballoon ablation procedure in paroxysmal AF *** therapy of AF and MetS may improve the long-term outcomes of AF patients.

关键词： balloon fibrillation atrial

Photodegradation of soluble microbial products(SMPs) from membrane bioreactor by GO-COOH/TiO2/Ag

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Journal of Environmental Sciences 2020年第2期32卷 292-300页

作者： Shuyan yu xia Huang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

This study aimed to explore a new degradation method-photocatalysis technology to polish membrane bioreactor(MBR) effluent, using 2,6-di-tert-butylphenol(2,6-DTBP) as a model soluble microbial product(SMP).2,6-DTBP is one of the predominant SMPs in MBR effluent, which is refractory and difficult to *** study developed a novel carboxylated graphene oxide/titanium dioxide/silver(GO-COOH/TiO2/Ag) nanocomposite to photodegrade 2,***-COOH/TiO2/Ag was successfully synthesized, using L-cysteine as the linker bonding TiO2/Ag to *** structural, morphological and optical properties of the GO-COOH/TiO2/Ag nanocomposite were characterized using various *** to synergistic effects, the GO-COOH/TiO2/Ag nanocomposite exhibited enhanced photocatalytic degradation performance under solar light irradiation when compared to TiO2, Ag and *** remove 25 mg/L 2,6-DTBP, the reaction time for GOCOOH/TiO2/Ag was only 30 min, faster than the 90 min required for pure TiO2 or *** addition, the 200 mg/L GO-COOH/TiO2/Ag nanocomposite aqueous solution showed the best performance under solar light, with 99% removal of 2,*** enhanced capability is likely due to the surface plasmon resonance(SPR) effect contributed by Ag nanoparticles(NPs) doped onto the *** addition, GO-COOH had a high effective surface area, which assisted in degrading the 2,6-DTBP through improved *** stability study showed that the photocatalytic activity of the GO-COOH/TiO2/Ag was stable enough for recycling multiple *** effective degradation performance and excellent stability demonstrates that the GO-COOH/TiO2/Ag nanocomposite can be a promising photocatalyst in the field of effluent SMP photodegradation, which solves the problem of the difficult biodegradation of highly toxic 2,6-DTBP.

关键词： Soluble microbial products (SMPs) 2,6-Di-tert-butylphenol (2,6-DTBP) Carboxylated graphene oxide/titanium dioxide/silver (GO-COOH/TiO2/Ag) nanocomposite Photocatalysis technology

Formation and structure of composite coating of HDA and micro-plasma oxidation on A3 steel

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 310-314页

作者： yu Sheng-xue xia yuan CHEN Ling GUAN Yong-jun YAO Mei Department of Environment Science and Chemical Engineering Yanshan University Qinhuangdao 066004 China Institute of Mechanics Chinese Academy of Science Beijing 100080 China Institute of Mechanics Chinese Academy of Science Beijing 100080 China Department of Environment Science and Chemical EngineeringYanshan University Qinhuangdao 066004 China Institute of Mechanics Chinese Academy of Science Beijing 100080 China College of Materials Science and EngineeringYanshan University Qinhuangdao 066004 China

Composite coatings were obtained on A3 steel by hot dipping aluminum(HDA) at 720 ℃ for 6 min and micro-plasma oxidation(MPO) in alkali electrolyte. The surface morphology, element distribution and interface structure of composite coatings were studied by means of XRD, SEM and EDS. The results show that the composite coatings obtained through HDA/MPO on A3 steel consist of four layers. From the surface to the substrate, the layer is loose Al2O3 ceramic, compact Al2O3 ceramic, Al and FeAl intermetallic compound layer in turn. The adhesions among all the layers are strengthened because the ceramic layer formed at the Al surface originally, FeAl intermetallic compound layer and substrate are combined in metallurgical form through mutual diffusion during HDA *** experiment results disclose that the anti-corrosion performance and wear resistance of composite coating are obviously improved through HDA/MPO treatment.

关键词： hot dipping aluminum micro-plasma oxidation composite coating ceramic coating

A Computational Investigation of the Group Effect of Pits on the Ultimate Strength of Steel Plates

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China Ocean Engineering 2018年第6期32卷 665-674页

作者： FU Qiang FANG Hui WU Ren-xia yu Xue-hui LI Hua-jun Institute of Coastal and Offshore Engineering School of Engineering Ocean University of China State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace Engineering Xi'an Jiaotong University

In this work, we focus on assessing the group effect of localized corrosion on the ultimate strength of the marine structural plates and study the load-deformation behaviors of plates of various slenderness and uniaxial ***, we investigate different corroded patterns from a single circular pit to 25 circular pits distributed over the plate and carry out hundreds of nonlinear finite element simulations by combining the number, depth, distribution of pits with imperfections and slenderness of plate. The distribution of multiple pits causes scattering of stress concentration on the plate, then the plastic section of plate changes with wider distribution of damage simultaneously. The ultimate strength arises when un-loading zone comprised of the yielding strips and holes extends across the plate. It can be concluded that the corroded condition defined as group effect of pits manipulates the deformation state and the loading capacity of plate at the ultimate strength mode that coincides with the proportion of effective loading area and section in the process of post-buckling. To validate the effect of pits group, we perform the numerical experiments of the post-buckling of steel plates containing pits in a row with different orientation.

关键词： group effect localized corrosion post-buckling ultimate strength